Special calcium silicon-rich controlled release fertilizer for southern paddy rice and preparation method thereof

Abstract

The invention discloses a special calcium silicon-rich controlled release fertilizer for southern paddy rice and a preparation method thereof. The calcium silicon-rich controlled release fertilizer is made from the following raw materials in parts by weight: 50-70 parts of a 5% special calcium silicate coated compound fertilizer for paddy rice, 10-30 parts of a 8% special calcium silicate coated compound fertilizer for paddy rice, 20-40 parts of a special compound fertilizer for paddy rice and 1-3 parts of zinc sulfate. The 5% special calcium silicate coated compound fertilizer for paddy rice and the 8% special calcium silicate coated compound fertilizer for paddy rice respectively mean that mass of calcium silicate coated layers account for 5% and 8% of total mass. Contents of nitrogen, phosphorous and potassium in the special compound fertilizer for paddy rice are 18%, 8% and 20% respectively. In the controlled release fertilizer, nutrients are regularly released, which is identical with nutrient absorption rules of southern paddy rice; membrane materials are cheap and available, do not have degradation problem and are environment-friendly. The controlled release fertilizer is once applied before transplanting paddy rice, an additional fertilizer is no longer required, and application amount of the controlled release fertilizer is reduced by 20% of that of common fertilizers, thus reducing labor intensity and fertilizer fund input of farmers.

Description

technical field [0001] The patent of the present invention relates to the preparation technology of new fertilizers in agricultural production, a special silicon-rich calcium controlled-release fertilizer for southern rice and its preparation method, including calcium silicate coating method, the formula technology of special silicon-rich calcium controlled-release fertilizer for southern rice, application It is used in the field production of rice in the south, and belongs to the fields of agriculture and ecological environment. Background technique [0002] Rice is one of the most important food crops. More than half of the world's population, or 3 billion people, depend on rice for their livelihood. my country is a big rice planting country, and rice accounts for about 60% of residents' ration consumption, and the proportion is still increasing year by year. Rice not only solves the food problem of 1.3 billion Chinese people, but also makes a huge contribution to the wor...

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Problems solved by technology

The rice-specific controlled-release fertilizer developed by Shandong Kingenta Ecological Engineering Co., Ltd. is only applicable to the soil in the north. Its raw material composition is a mixture of nitrogen, phosphorus, and potassium fertilizers, and the coating material of nitrogen fertilizer (urea) is thermoplastic resin, which is not conducive to The soil degrades naturally; the controlled-release rice special blend fertilizer prepared by the Guangdong Academy of Agricultural Sciences also physically mixes nitrogen, phosphorus, and potassium together, and adds humic acid and dicyandiamide as controlled-release materials. The fertilizer does not contain Silicon and calcium; the special fertilizer for rice developed by Ningxia Xiarui Agriculture has no controlled release effect, and the number of fertilization during the entire growth cycle of rice does not decrease

There are no reports or records on the development of silicon-rich and calcium-rich controlled-release fertilizers for southern rice.

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